Grinding-machine



(No Model.)

" 410 sheets-sheen, 1.

C.. H. TRASK.

GRINDING MACHINE.

Patented Deo. 4, 1894.

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HJTRSK. i GRINDING MAHINB.`

10 Sheets-Sheet 2.

(N0 MOdeU IM/ENTER owf- Patented Deo. 4, 1894.

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(No Model.) 10 Sheets-Sheet 3.

GLHTRASK. GRINDING MACHINE.

No, 530,292. Patented Deo. 4, 11894.

'WITNS INVENTUR.

No Model.; 1o sheets-sheet 4.

C.' H. TRASK. GRINDING MACHINE.

No. 530,292. PatentedDec. 4, 11894.`

' IIIIIIII MTNESSEE- l @z l 1|! VENTUR- (No Modemv Y G. H. TRASIL GRINDING MACHINE.'

1o sheetssheet 5.

\ Patented 1390.4; 1894,;

(No Model.) lO'Sheets-Sheet 6.

0,5. TRASK- GRINDING MACHINE.

N. 530.292. Patented Dec. 4,1894.

(No Model.) 10 Sheets-Sheet 7,

@.-LTRASKQ GRINDING MACHINE.

l No. 530,292.` Patented Dee. 4, 1894.

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(No Model.) 10 Sheets-Sheet 8.

C.. H. TRASK.

. x GMNDING MACHINE. l No. 530,292. Patented Deo. 4, 1894.

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.(No Model.) 10 Sheets- Sheet 9.

0. H. TRASK.

V GRINDING MACHINE. No. 530,292. Patented Deo. 4, 18945 UNITED t STATES,l

APATENT OFFICE.

CHARLES H. TRASH, or LYNN, MASSACHUSETTS.

GRlNDlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 530.292, dated December 4, 1 8 94. Application led November 6,1891. Serial No. li11,041 (No model.)

.To all whom it may cancern.:

Be it known that I, CHARLES H. TRASH, a citizen of the United States,residing at Lynn, in the county of Essex and `State of Massa` chusetts, have invented a new and useful Improvement in Grinding-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings forming a part of this speciication, in explaining its nature.

The invention relates to an improvement in grinding machines organized to grind au-` tomatically and simultaneously the hole and one side face of a disk, cutter or otherthing. To

accomplish this end the disk is mounted in a chuckwhich is adapted to be rotated in the ordinary way, and an internal grinding wheel is mounted upon a spindle carried bya head which has a movement on the bed of the machine to and from the chuck. This grinding wheel or disk is adapted to grind the internal surface of the disk or cutter. Another grind' ing wheel is mounted upon another spindle carried by a head which has a traversing movement in a direction at right angles to that of the first spindle and head, and this grinding wheel serves to act upon the face of the disk or cutter. The respective movements of the two grinding wheels are so timed that they do not interfere with each other. Either grinder can be used independently if desired and the extent'of the traversing movementof each is independently adjustable.

j The invention further relates to various features of organization and construction, all of which will hereinafter be described.

In the drawings-Figure lis aview in plan of a machine having the features of my in-` vention. Fig. 2 is a view principallyin side elevation, a portion of the frame of the `machine being broken out to show a portionof the operative mechanism. Fig. 3 is a view in end elevation of my improved machine. Figs. 4, 5 and 6 are detail views to show various adjustments of the parts to which reference `is hereinafter made. Fig. 7 is avdetail view enlarged principally in-section to show the mechanism for operating the head carrying the face grinding wheel. Fig. 8 is a vertical section showing the head which carries the spindle operating the internal grinding wheel. Fig. 9 is a section upon the dotted line y y of Fig. 8. Figs. 10 and 11 represent means for tudinal section of the clutch. Fig. 14 is a Lcrosssection upon the dotted line of Fig. l2

representing the tooliblank as held by the internal clutch.

Referring to the drawings A is the frame of .the machine. It has at` its top the longitudinal bed a. Upon this bed at one end is the head B carrying the chuck and at the other end a reciprocating or traversing head C carrying the internal grinder wheel or tool C2. The head B carrying the chuck preferably is attached or secured to the bed a. in a manner to permit ot' variation upon ahorizontal plane of the chuck from and to the central line of itsspindle for the purpose of adjusting the chuck and disk or cutter carried thereby either to a central `'position or toa Vposition which shall move the spindle and chuck to `any desired angle in relation to said central line, either to the one side or the other.` This is for the purpose of presenting the disk or cutter being ground at any desired angle or position to the grinding wheels. In addition to this adjusting movement the head is also `provided with a swinging movement horizon- `tally whereby it is adapted to be turned from its operative position or that shown inFig. 1,

to the position shown in Fig. 5. `This permits the clutch and the disk or cutterwhich it holds to be moved away from the grinding wheels or tools to a position to be readily inspected and measured by the operator.'

The adjustment and swinging movement of 1the clutch head are accomplished as follows: `The clutch head is `mounted upon theblock` b which is secured to the bed of the machine.

the plate b2 by a spring pin bs which may be similar in form and construction to the spring IOC pin 014. Shown in Fig. 8. When the spring pin is disengaged from the plate b2 the plate b3 and the shaft h6 and clutch are adapted to be turned upon the stud 117 to the position represented in Fig. 5. The circular plate b2 is adapted to be adjusted by means of the adjusting screws 59h10 carried by the block b which bear upon each side of a tongue bu extending from the edge of the plate b2 (see Fig. 1l), and as the plate b3 has a pin Z312 which enters a grooved slot blsin said plate b2 and as the end 1114 of the slot in connection with the spring pin bs determines the position of the plate b? in relation to the plate h, it follows that if the plate b2 is rotated or moved by the adjusting screws b9 Z910 that the angle of the shaft be upon a-horizontal plane from the central line of the chuck spindle will be varied.

The head C not only has a reciprocating movement toward and from the chuck but it is laterally adjustable and is also adapted to be turned from its straight or operative position represented in Fig. l to the position represented in Fig. 4. The head comprises as a whole the slide c (see Fig. 8) which has a dovetail way c in its under face to lit dove tail guides of the bed ct. Upon this slide is another or cross slide C which is mounted upon the slide c by a dove-tail connection to have a traversing movement thereon, the said movement being accomplished by means of an adj usting screw c2 carried by the extension c3 of the slide and screwing into a nut c4 in the slide c. This screw is turned by the handle c5. (See Fig. 2.) This slide C carries the plate cfrom which rise the standards c7 c8 supporting the shaft C9 to which the spindle 01 carrying the internal grinding wheel C2 is attached, and the plate is secured to the slide C by a central stud 010 in a manner to permit it to be horizontally rotated thereon a portion of a revolution, the extent of said rotation being limited by a stop pin c11 (see Fig. 9) which extends into a slot c12 in the plate 013 carried by the slide C.

To hold the plate c6 in operative position upon the slide C I have used the spring pin c14 carried by said plate ci and adapted to engage the hole 017 in the plate cl3. To turn the upper portion of the head, the spindle and grinding wheel from the position shown in Fig. 1 to that shown in Fig. 4E, it is simply necessary to move upward the spring pin 014 from its engaging hole 017 and turn the plate upon the center of the stud. The spindle shaft o9 carries a pulley from which an operating belt runs.

The head C is reciprocated by means of a crank pin D, pitman d, spindle or rod d and a block d2 secured to the spindle and to the end of the slide C. (See Fig. 2.) This block d2 is made adjustable upon the spindle or rod d by means of a set screw d3 and this varies the j point to which the grinding wheel is adapted to be moved each reciprocation of the slide and therefore provides a means for the main driving shaft d6 by means of a worm wheel d? at its end and a worm d8 upon the shaftd. The facing grinder E is mounted upon the spindle e carried at the end of a 'shaft e mounted in the standards e2 e3 of the head E. This head E comprises a slide e4 -mounted upon the lateral extension E2 of the frame of the machine, the slide having a dovetail recess to receive a dovetail guide. It has mounted upon it a cross slide e5 which is connected with the slide e4 by a dovetail tongue e5 and recess. (See Fig. 7.) This slide is adjustable laterally upon the slide e4 by means of an adjusting screw e7 carried by tne plate e5 and screwing into a nut carried by or formed in the slide e4. Upon this slide e5 is mounted a plate e8 from which rise the standards e2 e3. This plate e8 is secured to the slide e5 by a stud e9 so that the plate is adapted to be turned upon the slide e5. The plate e8 has the grooved slot ew through which extends a clamping screw e to the slide e5, and this clamping screw serves to lock the plate e8 in any desired position upon the slide e5. The slide plate e4 is provided with a reciprocating movement by means of a worm cl2 upon the shaft (Z6, (see Fig. 7,) a worm wheel cl3 which engages said worm cl2 and which is at the lower end of the vertical shaft em' and the disk 615 upon which is mounted the adjustable crank pin @16. The crank pin is connected with the slide e4 by the pitman e and the block or stud 618, the stud extending through a slot @-19 in the rear end of the plate e4 and being clamped to the plate between a washer and a shoulder of the stud by a nut 620. (See Figs. l and 7.) The slot e19 and adjustable crank pin el@ provide means for adjusting the position of the slide and the extent of its reciprocation.

While I prefer as a rule that the grinding wheel E which grinds one face of the disk or cutter held by the chuck be mounted so that the periphery of the grinding wheel be used for grinding instead of a face of the wheel, thus necessitating that the shaft e be at right angle to the shaft c, I would say that I do not confine myself to this construction, as by turning the plate eB to the position represented in Fig. 6 the shaft e is turneda quarter revolution and the grinding wheel E then brought into such a position that a face instead of the periphery is brought into contact with the face of the cutter or disk to be ground.

It will be understood that the operation of the various devices is as follows: First the IIO disk Vor cutter to be ground is mounted in the chuck carried by the head B and properly centered and the grinding Wheels adjusted to the work. The machine being set in operation the chuck and the disk or cutter which it carries are rapidly rotated and the grindj ing wheel C2 is rotated and at the same time both faces of the disk or tool blank, I have provided the chuck head with a chuck for holding the disk or tool blank by the surface about the hole instead of its outer edge. This construction is represented in Figs. 12, 13 and 14. When it is employed it is desirable to iirst finish the inner surface about the hole and one side of the disk or tool blank and the disk or tool blank at its finish is then mounted upon the chuck as shown in Figs. 12, 13 and 14 with its finished face against the shoulder m of the chuck and the sections m of the chuck in the hole in the disk or tool blank. These sections are formed upon the end of the wedge spindle m2 by means of slits cut in from its end m3 and the spindle 'm2 tits a conical cavity in the shaft m4. (See Fig. 12.) There extends through a hole m5 in the spindle and a hole in the shaft a rod m6 having at its front end a conical Wedge m7 which shuts between `membersm of the chuck, and at its opposite end a screw thread m8 which receives a nut m9 at the rear end of the shaft` or disk so held has :its unfinished face presented to the action of the face grinder E, the interior grinder not being used at this time.

Having thus fully described my invention,

I claim and desire to secure by Letters Patent ot the United Statesl. The combination in a grinding machine, of a rotary chuck adapted to hold blanks and other articles to be ground, a grinding wheel having its axis in line with the axis of the chuck'and movable in the line of its axis, and

` a second grinder movable in a direction at an angle to the axis of lthe chuck the supports j for each wheel and the chuck being adjustable on an axis at a right angle to its line of j movement, and means for reciprocating said grinders in their respective directions, substantially as described.

2. The combination in a grinding machine of the rotary chuck, the reciprocating and rotary grinding wheel, and a support or head for the chuck, said head being pivotally connected with a plate and adapted to be turned upon said plate to move the chuck out of operative relation to the grinding wheel, and independent means for adjusting said plate on its axis, whereby said plate and the head carried by it may be adjusted to suit different requirements, and the head may be turned independently of the plate, substantially as described. j

3. The combination in agrinding machine `of a rotary chuck, its supporting head mounted upon the bed of the machine, the carriage c, the head carried by and adjustable thereon, its shaft and the grinding Wheel with the adjustable crank pin D, pitman dadj ustably connected to the carriage and connectingI rod d', as and for the purposes described. I

et. The combination in a grinding machine of a rotary chuck, a rotary, reciprocating interior grinding wheel and means for varying the extent of its reciprocation and the place of its reciprocating, with a rotary, reciprocating face grinding wheel and means for varyi'ng the extent of its reciprocation and place of its reciprocation, as and for the purposes described. p i

CHARLES H. TRASK.

Witnesses:

F. F. RAYMOND, 2d, J. M. DOLAN. 

